Common Options : Enabled, Disabled

Details

This BIOS feature enables or disables the AGP2X transfer protocol. The standard AGP1X only makes use of the rising edge of the AGP signal for data transfer. At 66MHz, this translates into a bandwidth of 264MB/s.

Enabling AGP 2X Mode doubles that bandwidth by transferring data on both the rising and falling edges of the signal. Therefore, while the clockspeed of the AGP bus still remains at 66MHz, the effective bandwidth of the bus is doubled. This is the same method by which UltraDMA 33 derives its performance boost.

However, both the motherboard chipset and the graphics card must support AGP2X transfers before you can use the AGP2X transfer protocol. Of course, this BIOS feature will only appear in your BIOS if your motherboard actually supports the AGP2X transfer protocol!

So, all you need to do is find out if your graphics card supports AGP2X transfers. If it does, enable AGP 2X Mode for a higher AGP transfer rate. Disable it only if you are facing stability issues (especially with Super Socket 7 motherboards) or if you intend to overclock the AGP bus beyond 75MHz and just can't disable sidebanding support.